The Plymouth Student Scientist
Document Type
Engineering, Computing and Mathematics Article
Abstract
This study investigated osmotic regulation in the amphipod, Gammarus chevreuxi, and is the first publication of this organism’s osmotic regulatory curves. Unlike most estuarine amphipods studied to date which are hyperosmotic regulators, G. chevreuxi is a hyper-hyposmotic regulator. The hyperosmotic gradient maintained by G. chevreuxi in dilute media is very low (~120mmol.L-1), which has been interpreted as evidence of freshwater ancestry among the Crustacea. Salinity acclimation did not appear to affect heart rate or pleopod beat frequency. The gill cells responsible for ion uptake appeared to be smaller in high salinities or distorted. The apical membrane in concentrated media shows signs of damage beneath the cuticle. These findings demonstrate strong osmoregulatory ability in G. chevreuxi and suggest descent from a freshwater lineage of amphipods.
Publication Date
2013-07-01
Publication Title
The Plymouth Student Scientist
Volume
6
Issue
1
First Page
104
Last Page
118
ISSN
1754-2383
Deposit Date
2019-05-15
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Houston, Sam
(2013)
"Osmotic regulation of the amphipod Gammarus chevreuxi (Sexton, 1912),"
The Plymouth Student Scientist: Vol. 6:
Iss.
1, Article 19.
DOI: https://doi.org/10.24382/91yd-az50
Available at:
https://pearl.plymouth.ac.uk/tpss/vol6/iss1/19
Included in
Engineering Commons, Physical Sciences and Mathematics Commons, Psychiatry and Psychology Commons
